The MagMa software was used to simulate and analyze the low pressure casting process of the L-shaped positioning support body

and to predict the location and size of the defects easy to appear in the castings. The simulation results show that during the whole filling process of the castings

the molten aluminum flows smoothly

and there exists absence of entraipped-gas or cold shut. Through cutting the middle surface

absence of casting defects such as porosity and shrinkage could be observed

showing reasonale pouring system design. Through small batch production verification

the appearance of the product meets the requirements of the drawing

and the product qualification rate is more than 98%.